Kliment Kolesnikov, Kirill Prigoda, Aleksandr Popkov and Vladimir Morozov clocked a combined time of 1min 30.44sec in the final at the Danish capital’s Royal Arena.

It was 0.07 seconds faster than that posted by Brazil at the 2014 World Championships in Doha in Qatar. 

Kolesnikov was the Russian relay team's stand-out performer as he shattered his own men’s 50m backstroke world junior record with a time of 22.83.

His previous best of 23.07 was set earlier in the day in the 50m backstroke final as he finished runner-up to Italy’s Simone Sabbioni, the winner in 23.05.

Sabbioni helped his country to a second-place finish in the 4x50m medley relay with Fabio Scozzoli, Piero Codia and Luca Dotto also contributing to their time of 1:31.91.

Belarus’ Pavel Sankovich, Ilya Shymanovich, Yauhen Tsurkin and Anton Latkin took the bronze medal in 1:32.06.

Rounding out the 50m backstroke podium was France’s Jérémy Stravius in 23.12.

Sweden’s Sarah Sjöström was in superb form today and broke two Championship records on her way to claiming the women’s 100m butterfly and 50m freestyle titles.  

In the 100m butterfly final, the Olympic champion clocked a time of 55.00 to win by nearly a second.

France’s Marie Wattel finished second in 55.97, while Denmark’s Emilie Beckmann came third in 56.22.

The 50m freestyle final saw Sjöström touch home in 23.30, which narrowly betters Dutchwoman Hinkelien Schreuder’s time of 23.32 set in 2009. 

The Netherlands’ Ranomi Kromowidjojo also dipped under the previous Championship record, clocking a time of 23.31 to finish second.

Denmark’s Pernille Blume had to settle for third place in 23.49.

Sjöström made it a hat-trick of gold medals by helping Sweden to top the women’s 4x50m medley relay podium in 1:44.43.

Also on the team was Hanna Rosvall, Sophie Hansson and Michelle Coleman.  

Denmark’s Julie Kepp Jensen, Rikke Møller Pedersen, Beckmann and Blume earned the silver medal in 1:45.00.

France’s Mathilde Cini, Charlotte Bonnet, Mélanie Henique and Wattel finished third in 1:45.35.

The first of Italy’s two gold medals today was won by Dotto, who clocked an unrivalled time of 46.11 in the men’s 100m freestyle final.

Belgium’s Pieter Timmers finished second in 46.54, while Great Britain’s Duncan Scott came third in 46.64.

Marco Orsi doubled Italy’s tally by winning the men’s 100m individual medley final in 51.76.

Russia’s Sergei Fesikov finished second in 51.94, while The Netherlands’ Kyle Stolk came third in 51.99.

Among today’s other winners was Russia’s Aleksandr Kharlanov as he came out on top in the men’s 200m butterfly final with a time of 1:50.54.

Greece’s Andreas Vazaios finished second in 1:51.23, while Hungary’s Tamás Kenderesi came third in 1:52.25.

Also tasting victory in the last session of action were Spain’s Jessica Vall and Hungary’s Boglárka Kapás in the women’s 200m breaststroke and women’s 400m freestyle events respectively.

Vall won her final in 2:18.41 with Pedersen second in 2:19.53 and Belgium’s Fanny Lecluyse third in 2:19.68.

Kapás, meanwhile, touched home in 3:58.15 to hold off Germany’s Sarah Koehler, the runner-up in 3:59.12, and Liechtenstein's Julia Hassler, the third-place finisher in 4:02.43.